Nut-tapping machine.



No. 691,199. Patented lan. I4, |902.

' J. STEPHANS.

NUT TAPPING MACHINE,

(Application med May 9, 1900.)

(No Model.) 4 Sheets-S'heet l.

IN 'SZ'.EN TUE:

THE rgnms Pmns co.. PHoTaLwHo.. wAsNlNsYoN.' D. c.

Patented 1am I4, i992. v J. STEPHANS.

NUT TAPPING MACHINE.

(Application filed May 9, 1900.)

4Sheis Sheet 2.

(No Model.)

WIZ'NEEEEE INyENl-E.'

1m: mums Prcns co, PHOTO-Luna, WASHINGTON. u c

No. 69I,I99. Patented Jan. I4, |902. J. STEPHANS. NUT TAPPING MACHINE.

(Application filed May 9, 1900.) (no Model.) 4 sneeiswsnee: 3.

Patented lan. I4, |902.

J. STEPHANS. NUT TAPPING MACHINE.

(Appucmon mea my 9, 1900.) (No Model.) 4 Sheets-Sheet fl` Ivg- .5Z 028. @Z8

z 3 5 s 2 702 o? @Z o? OZ Z9 r1 l 6 @Z OZ UZ WITNEEEEE.'

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JACB STEPHANS, OF PAWTUCKET, RHODE ISLAND.

nuT-TAPPING. MACHINE.

SPEGFFICATION forming part of Letters Patent No. 691,199, dated January 14, 1&902.

Application tiled May 9, 1900. Serial No. 16,015. (No model.)

To all whom it may concern:

Be it known that I, JACOB SrnrHANs, a citizen of the United States, residing at Pawtucket, in the county of Providence and State of Rhode Island, have invented a new and useful Improvement in Nut-Tapping Machines, of which the following is a specification.

This invention has reference to an improve- 1o ment in machines for tapping nuts; and it l consists in the peculiar and novel construction and combination of parts whereby two or more tapping-spindles are operated by one belt and the nut-feeding devices are operated I5 by cams simultaneously or consecutively, as

will be more fully set forth hereinafter.

The object of this invention is to so construct and arrange a nut-tapping machine that two or more tapping-spindles may be 2o readily supplied by one attendant, and also so that in the one machine nuts may be internally threaded with threads of different pitch while using the same cam for operating the feeding devices.

Figure 1 is a side view of my improved nuttapping machine. Fig. 2 is a front elevation of the same, showing two tapping-spindles operated by one belt. Fig. 3 is a vertical longitudinal section through the center of one 3o of the nut-tapping and nut-feeding devices.

Fig. 4 is a longitudinal sectional view showing the connection of the cam-shaft with the driving-shaft. Fig. 5 is a transverse sectional view of the adjustable nut-holding jaws. Fig. 3 5 6 is a perspective view of the nut-holding jaws. Fig. 7 is a perspective view of the socket for the tapping-spindle. l

In the drawings, a indicates a hollow castmetal standard of practically rectangular 4o cross-section. The rear portion of the standard extends above the front portion and forms the transversely-extendin g pillow-blocks a d. In front the brackets d2 d2 extend from the standard outward and form an overhanging support for the beds CL3 d3. The forward part of the standard has the troughs a4 a4 extending along each side and the front to form a convenient receptacle for nut-blanks within easy reach of the attendant.

On the pillow-blocks d a journal-bearings for the spindles b b are supported. On each spindle bY a pulley b is secured. Between the pulleys b' b' the idle pulley bgis supported in bearings formed in brackets which are secured to the two pillow-blocks a' Ct'. A belt (indicated in broken lines in Fig. 21) extends under the pulleys b b and over the pulley b2 and drives the same in the direction indicated by the arrows.

The beds d3 as have the grooved ways a5 d5, on which the reciprocating carriages c c are supported. The stocks c' c' are secured to each of the carriages c c. The heads c2 of the stocks c have the cylinder c3, in which the piston c4 is supported. The piston c4 has a stem c", which extends through a hole in the closed end of the cylinder c3. A spiral spring c6 surrounds the stem, one end bearing on the closed end of the cylinder and the other against the piston c4. The nuts c7 on the threaded portion of the stem c5 serve to adjust the spring c6 and limit the forward movement of the piston cl. The piston is held against rotation by a stop in the wall of the cylinder c3, which enters a longitudinal groove in the piston c4. The pusher c8 is secured to and projects from the piston c4. The front end of the pusher is bored out to allow the thread-cutting die to enter the pusher, as is shown in Fig. 3.

The tray d forms the support for the nutgnide. It is rigidly secured to and supported on the ways d5, as is shown in Fig. 3 and on an enlarged scale in Fig. 5. From the tray d extend upward the transversely-extending ways d d', on which the carriages d2 cl2 slide. j

The nuts d3 d3 form parts of the carriages cl2 d2. The right and left handed screw d4 eX- tends through the nuts d3 on the carriages. The central disk d5 rotates in a groove in the block d6, so that when a wrench is placed on the end d7 and the screw turned both the carriages are adj usted toward or from the center. The jaws d8 d8 are longitudinally grooved to conform to the shapes of the nuts to be tapped,the front ends didibeingformed to permit the insertion of nuts. The jaws d8 are secured to the carriages d2 d2 and are adj usted to hold the nuts against rotation while permitting the nuts to slide with a loose sliding fit along the grooves in the jaws.

Vhen properly adjusted, the carriages are ICO . by a bearing in the tubular sleeve blo.

preferably firmly secured to the tray bysuitable bolts, asis shown in Fig. l and indicated by the screw d10 in Fig. 3.

To the screw-threaded front end of the spindle b the socket-piece b3 is secured, and in the end of this piece a preferably hardened-steel socket b4 is secured, in which the end of the tap-rod b5 is supported. To the rear of one of the spindles b the pinion-gear b6 is secured, engaging with the intermediate gear b?, which engages with the gear b8 on the shaft b9. The intermediate gear b7 is journaled on an adjustable post, so that it may be moved and a smaller or larger gear substituted for the intermediate gear, such construction being of any one of the usual construction of speed-change gearing. The shaft b is supported near the front end The sliding part b11 of the clutch blz. is connected with the clutch-lever Z913, the lower end of which is pivoted to a fixed part of the standard. The bevel-gear b22 on the clutch buengages with the bevel-gear b14 on the transversely-extending camshaft b15. lUnderneath each one of the carriages c c a cam b16 svs is secured to the cam-shaft b. These vcams may be set so as to actuate the carriages together or one after the other, and if more than two spindles are used in one machine the cam-shaft b15 maybe lengthened and cams secured to actuate any desired number of carriages.

The cam b16 bears against the roller b, journaled in an arm extending from the carriage c. The carriage is held against the cam by the weight bla, suspended from the strap.

b1, which, extending over the pulleys b2 and b21, is secured to the carriage c. By this construction a positive forward motion is imparted to the carriages by the cam and a quick return by the force of gravity exerted by the weight bs. For tapping a variety of nuts differing in diameter and pitchvof the internal screw-thread the cam b1G is formed to feed nuts of the highest pitch. When nuts are to be tapped at less pitch, the springpressed piston c4yields sufficiently to compensate for the difference in the pitch and recovers its normal position. As each nut is tapped it remains on the tap-rod b5 and is pushed farther and farther onto the tap-rod. When the tap-rod is full, it may be removed and the nuts taken off the rod.

Having thus described my invention, I claim as new and desire to secure by Letters Patentv 1. The combination of a standard provided with an overhanging support at the front thereof and a troughextending around three sides of the said overhanging front, a set of rotary tool-carryin g spindles mounted side by side parallel to each other upon the standard and provided with means for driving the spindles in the same direction, a set of horizontally-reciprocatin g tables provided with guideways located upon said overhanging front and means for reciprocating said tables, a nut holder and guide arranged in stationary position over each of said tables, and a nutpusher mounted upon each of said tables at the forward end thereof and adapted to enter said holder and guide to push the nut through the same in the direction of the tool-spindles, substantially as and for the purpose set forth.

2. In a nut-tapping machine, a horizontal rotatable tap-rod held against longitudinal movement, a horizontally-reciprocating carriage, a stock on the carriage, a spring-pressed piston mounted in the stock, a nut-pusher detachably secured in the piston, a separate nut-support detachably secured to the machine and having longitudinal grooves in which the nut and pusher may slide, means for rotating the tap-rod, and means for reciprocating the carriage, substantially as described.

3. In a bolt-tapping machine, the combination with the standard, a head-stock on one end of the standard, a plurality of spindles placed parallel to each other journaled in the head-stock, tapping-rods on the spindles and a plurality of stationary nut-guides, of a plurality of reciprocating carriages, ways for the reciprocating carriages placed parallel to each other, spring-pressed pushers on the carriages, means for rotating the spindles, a central shaft, and a cam-shaft for operating the reciprocating carriages, whereby a number of nuts may be tapped simultaneously with screw-threads differing in pitch, as described.

4. In a nut-tapping machine, in combination, two or more spindles, tap-rods in the ends of the spindles, means, comprising a belt,for rotating all the spindles in the same direction, two or more carriages, a cam-shaft extending transversely under the carriages, actuating-cams on the cam-shaft, one for each carriage, mechanism intermediate the camshaft-and one of the spindles, stocks on the carriages, cylinders in the stocks, and spring` pressed pistons in the cylinders, nut-pushers yieldingly supported by the pistons, and adjustable jaws for guiding the nut-blanks, as described.

5. In a nut-tapping machine, a combined holder and guide consisting of two carriages detachably mounted on the machine and adjustable toward and away from each other, a jaw adjustably mounted in each carriage, a longitudinal groove in each jaw into which a portion of the nut may enter and be held thereby against rotation, and an enlargement of the grooves at one end to permit insertiono of the nut, substantially as described.

6. The combination of a rotary horizontal tool-carrying spindle and means for driving it, a horizontally-reciprocating table moving in a plane parallel with the axis of the spindle and means for actuating it, a tray fixed above and across the end of the reciprocating table nearest'to the spindle and independently of the table, an adjustable work-holder IOO IIO

and guide mounted upon said tray and inl In testimony whereof I have signed my axial alinement with said spindle, and a name to ILhis specification in the presence of spring-mounted Work-pusher located upon two subscribing Witnesses.

the far end of said reciprocating table and l JACOB STEPHANS.

adapted to project into said Work-holder and Witnesses: guide to push upon thework, substantially B. M. SIMMS, as and for the purpose set forth. J. A. MILLER, Jr. 

